Valve device
By setting a progressive notch structure at the edge of the valve core flow channel opening, the problem of the sealing gasket folding when the valve device switches flow paths is solved, thus achieving stable sealing performance and effective fluid containment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-27
AI Technical Summary
The gasket is prone to folding when the valve device switches flow paths, which can lead to a decrease in sealing performance or failure.
A progressive notch structure, such as a groove that is recessed radially inward, is provided at the opening edge of the valve core flow channel to guide the sealing gasket to transition smoothly during valve core rotation and prevent folding.
Ensure that the sealing gasket can be tightly pressed against the outer circumferential surface of the valve core after exiting the valve core flow channel, maintain a good sealing effect, and reduce the risk of leakage.
Smart Images
Figure CN224049737U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the field of fluid control, and in particular, to a valve device. BACKGROUND
[0002] Valve devices are commonly applied to equipment or systems with fluid control requirements, such as thermal management systems of vehicles. Some valve devices include a valve core and a sealing gasket, the valve core is provided with a valve core flow passage, the valve core flow passage is able to form a flow path after being communicated with an external flow passage port, and the sealing gasket is used to prevent fluid from leaking from the flow path. By rotating the valve core, the communication relationship between the valve core flow passage and the external flow passage can be switched.
[0003] However, when the communication relationship between the valve core flow passage and the external flow passage port is switched, the sealing gasket can be folded, resulting in a decline in sealing performance, or even failure. SUMMARY
[0004] Therefore, the present disclosure provides a valve device to solve the problem of decline in sealing performance of the sealing gasket after the valve device switches the flow path.
[0005] The valve device provided by the present disclosure includes a valve body, a valve core, and a plurality of sealing gaskets. The valve body has a plurality of external flow passage ports. The valve core is arranged in the valve body, and the valve core is provided with at least one valve core flow passage. The valve core can be driven to rotate to switch the communication relationship between the at least one valve core flow passage and the plurality of external flow passage ports. The plurality of sealing gaskets are located at the connection positions of each external flow passage port and the at least one valve core flow passage, and are fixedly connected with the valve body. The opening edge of each valve core flow passage is provided with a progressive notch structure, and the progressive notch structure is configured to guide the smooth transition of the edge of the sealing gasket during the rotation of the valve core.
[0006] It can be understood that, if the opening of the valve core flow passage is not provided with the progressive notch structure, after the valve device is assembled, the side of the sealing gasket close to the valve core is pressed against the outer peripheral surface of the valve core. When the communication relationship between the valve core flow passage and the plurality of external flow passage ports is switched, the valve core flow passage rotates with the valve core, and after the opening edge of the valve core flow passage passes the sealing gasket, the part of the sealing gasket that lacks the support of the outer peripheral surface of the valve core will extend into the valve core flow passage. As the valve core continues to rotate, when the other opening edge of the valve core flow passage in the rotation direction of the valve core passes the sealing gasket, the part of the sealing gasket can exit the valve core flow passage and be pressed against the outer peripheral surface of the valve core. However, the part of the sealing gasket that extends into the valve core flow passage will be blocked by the part between the outer peripheral surface of the valve core and the valve core flow passage when it exits the valve core flow passage, thereby being folded. In this way, the folded sealing gasket cannot be tightly pressed against the outer peripheral surface of the valve core after it exits the valve core flow passage, resulting in a failure of the sealing function.
[0007] According to the embodiments provided by the present disclosure, the opening edge of the valve core flow channel is provided with a progressive notch structure, which enables the part of the sealing gasket extending into the valve core flow channel to contact the progressive notch structure and exit the valve core flow channel after passing through the progressive notch structure when switching the communication relationship between the valve core flow channel and the plurality of external flow channel ports. Since the notch structure gradually changes in the rotation direction of the valve core, the part of the sealing gasket extending into the valve core flow channel is smooth during the contact with the progressive notch structure, which can avoid the folding of the sealing gasket when exiting the valve core flow channel, and after exiting the valve core flow channel, the sealing gasket can tightly abut against the outer peripheral surface of the valve core to ensure the sealing effect.
[0008] As a possible implementation manner, the progressive notch structure includes a pair of recesses recessed to the radial inner side of the valve core, the pair of recesses are located on the opposite sides of the corresponding valve core flow channel port in the rotation direction of the valve core, and each recess extends from the corresponding valve core flow channel port to the direction away from the valve core flow channel port.
[0009] According to the embodiments provided by the present disclosure, no matter the rotation direction of the valve core, the part of the sealing gasket extending into the valve core flow channel can exit the valve core flow channel after passing through the recess, avoiding the folding phenomenon.
[0010] As a possible implementation manner, the width of the recess gradually decreases in the direction away from the corresponding valve core flow channel port.
[0011] According to the embodiments provided by the present disclosure, as away from the corresponding valve core flow channel port, the contact surface of the sealing gasket with the bottom surface of the recess gradually decreases, and the contact surface with the outer peripheral surface of the valve core gradually increases, which enables the sealing gasket to gradually obtain the support of the outer peripheral surface of the valve core in the process of exiting the valve core flow channel, and finally abut against the outer peripheral surface of the valve core. In addition, this implementation manner can also reduce the volume reduction of the valve core and ensure the structural strength.
[0012] As a possible implementation manner, the depth of the recess gradually decreases in the rotation direction of the valve core and in the direction away from the valve core flow channel port.
[0013] According to the embodiments provided by the present disclosure, the part of the sealing gasket extending into the valve core flow channel can gradually move outward in the radial direction of the valve core, i.e., gradually away from the valve core flow channel, during the process of passing through the recess, and finally reach the outer peripheral surface of the valve core, which makes the process of the sealing gasket exiting the valve core flow channel relatively smooth.
[0014] As a possible implementation manner, the bottom surface of the recess is a smooth curved surface.
[0015] According to the embodiments provided by the present disclosure, the sealing gasket can be in smooth contact with the bottom surface of the recess during the process of exiting the valve core flow channel, so as to avoid the sealing gasket being torn or folded.
[0016] As a possible implementation, the outer circumferential surface of the valve core is a part of a spherical surface, and the end of the groove away from the valve core flow passage opening is located on the horizontal circumferential line of the spherical surface with the largest outer diameter.
[0017] When the sealing gasket passes the two edges of the opening of the valve core flow passage in sequence, it is easy to stretch into the valve core flow passage without the support of the outer circumferential surface of the valve core. The part of the sealing gasket located on the horizontal circumferential line of the spherical surface with the largest outer diameter travels the farthest, i.e., the longest moving distance, when passing between the two edges of the opening of the valve core flow passage, and thus is prone to folding when exiting the valve core flow passage. According to the embodiment of the present disclosure, the groove is arranged on the horizontal circumferential line of the spherical surface with the largest outer diameter to guide the sealing gasket, which can ensure that the part of the sealing gasket that is most prone to folding smoothly exits the valve core flow passage.
[0018] As a possible implementation, the valve core flow passage opening is a part of a circle, the end of the groove away from the valve core flow passage opening is at a distance D1 from the smallest distance of the circle, the diameter of the circle is D2, and 1 / 5≤D1 / D2≤1 / 3.
[0019] If D1 / D2 is too small, it means that the groove can guide the sealing gasket for a short distance, and thus it is difficult to ensure the guiding effect of the progressive notch structure on the sealing gasket; if D1 / D2 is set too large, it means that the groove will occupy a large space on the outer surface of the valve core, and especially when multiple valve core flow passage openings are arranged on the valve core, the groove may interfere with the adjacent valve core flow passage opening or the groove on the valve core flow passage opening. The groove arranged according to the above numerical range can ensure the guiding effect of the groove and avoid interference with other valve core flow passage openings or grooves on the valve core flow passage opening.
[0020] As a possible implementation, the edge of the groove and / or the edge of the valve core flow passage opening has a rounded corner structure.
[0021] In the process of rotation of the valve core, the sealing gasket will enter and exit the valve core flow passage opening through the edge of the groove and / or the edge of the valve core flow passage opening. According to the embodiment of the present disclosure, the edge of the groove and / or the edge of the valve core flow passage opening is configured as a rounded corner structure, which can reduce the wear and damage of the sealing gasket when passing through these edges, thereby ensuring the sealing performance.
[0022] As a possible implementation, the sealing gasket includes a fixed part and a lip part, the fixed part is in the shape of a circular ring and is fixed to the valve body, the lip part is closer to the valve core than the fixed part and is pressed against the outer circumferential surface of the valve core, the lip part is in the shape of an outwardly expanding circular ring, and the thickness of the lip part gradually decreases as it approaches the valve core.
[0023] Since the part pressed against the outer circumferential surface of the valve core has a small thickness, the lip part is easy to deform. When the fluid pressure acts on the lip part, the lip part can press the outer circumferential surface of the valve core tightly to provide good sealing effect and reduce the risk of leakage.
[0024] As a possible implementation, on the outer circumferential surface of the valve core, the edge of the sealing gasket surrounds the edge of the groove and the valve core flow passage port as a whole.
[0025] Since the groove is located on the valve core flow passage port, after the valve core flow passage communicates with the external flow passage port, the groove also constitutes part of the flow passage. According to the embodiment of the present disclosure, the edge of the sealing gasket surrounds the edge of the groove and the valve core flow passage port as a whole, which can prevent fluid from leaking out of the flow passage through the groove. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced below.
[0027] It should be understood that the following drawings only show some embodiments of the present disclosure and should not be considered as limiting the scope.
[0028] It should also be understood that the same or similar reference signs are used to represent the same or similar elements in the drawings.
[0029] It should also be understood that the drawings are only schematic and the sizes and proportions of the elements in the drawings are not necessarily to scale.
[0030] Figure 1 is a structural schematic diagram of a valve device in the prior art.
[0031] Figure 2 is an exploded schematic diagram of the valve device in Figure 1 .
[0032] Figure 3 is a sectional view of the valve device in Figure 1 .
[0033] Figure 4 is a structural schematic diagram of a part in Figure 3 .
[0034] Figure 5 is a structural schematic diagram of a valve core in Figure 2 .
[0035] Figures 6A-6C is a structural schematic diagram of the valve core in Figure 4 at different positions.
[0036] Figure 7 is an exploded schematic diagram of a valve device according to an embodiment of the present disclosure.
[0037] Figure 8 is a sectional view of the valve core in Figure 7 .
[0038] Figure 9 isFigure 7 Structure diagram of the valve core in different positions.
[0039] Figures 10A-10C is Figure 8 Structure diagram of the valve core in different positions. DETAILED DESCRIPTION
[0040] Embodiments of the present disclosure will be described herein below, by way of example only, with reference to the accompanying drawings. It should be understood that implementations of the present disclosure can vary, and are not to be limited to the embodiments set forth herein, which are meant only for purposes of illustration and understanding.
[0041] Figure 1 and Figure 2 A valve device 100 is shown, which may, as an example, be a multi-way ball valve, and can be applied in a device or system having fluid control requirements, for example, the valve device 100 can be applied in a vehicle thermal management system for switching the flow path of fluid.
[0042] With reference to Figure 1 and Figure 2 The valve device 100 includes a valve body 10 and a valve core 20. The valve body 10 has a plurality of external flow passage ports 11, and the valve core 20 is arranged in the valve body 10. In combination with Figure 3 The valve core 20 is provided with at least one valve core flow passage 21, and as an example, the valve core 20 can be provided with two valve core flow passages 21. The valve core 20 can be driven to rotate to switch the communication relationship between the at least one valve core flow passage 21 and the plurality of external flow passage ports 11.
[0043] With reference to Figure 2 The valve device 100 further includes a plurality of sealing pads 30, which are arranged at the connection positions between each external flow passage port 11 and the at least one valve core flow passage 21, and are fixedly connected with the valve body 10. The plurality of sealing pads 30 are used to prevent fluid from leaking from the flow path formed after the valve core flow passage 21 communicates with the external flow passage port 11.
[0044] As a possible implementation, with reference to Figures 2-4 The sealing pad 30 can include a fixed portion 31 and a lip portion 32. The fixed portion 31 is annular and fixed to the valve body 10, and the lip portion 32 is closer to the valve core 20 relative to the fixed portion 31 and is pressed against the outer circumferential surface of the valve core 20. The lip portion 32 is outwardly expanding annular, and the thickness of the lip portion 32 gradually decreases as it approaches the valve core 20. Since the portion pressed against the outer circumferential surface of the valve core 20 has a small thickness, the lip portion 32 is easy to deform. When fluid pressure acts on the lip portion 32, the lip portion 32 can press the outer circumferential surface of the valve core 20, providing good sealing effect and reducing the risk of leakage.
[0045] In addition, the internal structure of the valve core 20 and the relationship with the sealing gasket 30 during rotation of the valve core 20 also affect the sealing effect of the sealing gasket 30. As an example, the process in which the internal structure of the valve core 20 adversely affects the sealing gasket 30 will be described below in conjunction with Figure 4 , Figure 5 and Figures 6A-6C .
[0046] Referring to Figure 4 , after the valve device 100 is assembled, the side of the sealing gasket 30 close to the valve core 20 is pressed against the outer circumferential surface of the valve core 20. Referring to Figure 6A , when switching the communication relationship between the valve core flow passage 21 and the plurality of external flow passage openings 11, the valve core 20 is rotated in the R direction shown in the figure, and the valve core flow passage 21 rotates with the valve core 20. After the opening edge of the valve core flow passage 21 passes through the sealing gasket 30, the part of the sealing gasket 30 that lacks the support of the outer circumferential surface of the valve core 20 (such as the lip 32 shown in the figure) extends into the valve core flow passage 21; referring to Figure 6B , as the valve core 20 rotates, the other opening edge of the valve core flow passage 21 passes through the sealing gasket 30, and the part between the outer circumferential surface of the valve core 20 and the valve core flow passage 21 presses against the lip 32 extending into the valve core flow passage 21; referring to Figure 6C , as the valve core 20 continues to rotate, the lip 32 is blocked by the part between the outer circumferential surface of the valve core 20 and the valve core flow passage 21 during the process of exiting the valve core flow passage 21, thereby causing the lip 32 to fold over.
[0047] The state of the folded lip 32 refers to the original outwardly expanding lip 32 being folded inwardly under the action of an external force. The folded lip 32 may be deformed during the process of contacting the outer circumferential surface of the valve core 20 after exiting the valve core flow passage 21, which makes the contact surface between the sealing gasket 30 and the outer circumferential surface of the valve core 20 not fixed. When fluid pressure acts on the lip 32, the lip 32 cannot be tightly pressed against the outer circumferential surface of the valve core 20.
[0048] To solve the above problems, referring to Figures 7-9 , Figures 10A-10C , the present disclosure provides a valve device 100a. It should be noted that the valve device 100a and the valve device 100 have some common elements, and in the valve device 100a, these elements will use the same reference numerals as in the valve device 100 to omit repeated description.
[0049] Referring to Figures 7-9 , the opening edge of each valve core flow passage 21a in the valve device 100a (i.e., the valve core flow passage opening 22a) is provided with a progressive notch structure 23 configured to guide the smooth transition of the edge of the sealing gasket 30 during rotation of the valve core 20a.
[0050] The progressive notch structure 23 refers to a notch formed in the valve core flow passage port 22a and having a gradually changing feature in the rotation direction of the valve core 20a. As an example, the gradually changing feature of the notch can be the shape of the notch on the outer surface of the valve core, the depth of the notch, etc.
[0051] According to the embodiments provided by the present disclosure, the valve core flow passage port 22a is provided with the progressive notch structure 23, which makes the part of the sealing gasket 30 extending into the valve core flow passage 21a able to contact the progressive notch structure 23 when switching the communication relationship between the valve core flow passage 21a and the plurality of external flow passage ports 11, and exit the valve core flow passage 21a after passing through the progressive notch structure 23. Since the notch structure gradually changes in the rotation direction of the valve core 20a, the part of the sealing gasket 30 extending into the valve core flow passage 21a is smooth during the contact with the progressive notch structure 23, which can avoid the folding of the sealing gasket 30 when exiting the valve core flow passage 21a, and after exiting the valve core flow passage 21a, the sealing gasket 30 can tightly abut against the outer circumferential surface of the valve core 20a to ensure the sealing effect.
[0052] As a possible implementation, referring to Figure 9 , the progressive notch structure 23 can include a groove 231 realized as a recess to the radially inner side of the valve core 20a, and the groove 231 extends from the corresponding valve core flow passage port 22a towards the direction away from the valve core flow passage port 22a. In the following, referring to Figure 9 and Figures 10A-10C , the process that the groove 231 guides the sealing gasket 30 to exit the valve core flow passage 21a is introduced.
[0053] Referring to Figure 10A and Figure 10B , in the process that the sealing gasket 30 reaches the outer circumferential surface of the valve core 20a from the valve core flow passage 21a, as the valve core 20a rotates, the part of the sealing gasket 30 extending into the valve core flow passage contacts the groove 231; referring to Figure 10C , as the valve core 20a continues to rotate, the part of the sealing gasket 30 extending into the valve core flow passage passes through the groove 231 and abuts against the outer circumferential surface of the valve core 20a. In this process, the sealing gasket 30 is not hindered by the part between the outer circumferential surface of the valve core 20a and the valve core flow passage 21a, so that the folding of the sealing gasket 30 can be avoided.
[0054] Further, referring to Figure 9 , the progressive notch structure 23 can include a pair of grooves 231, and the pair of grooves 231 are located on the opposite sides of the corresponding valve core flow passage port 22a in the rotation direction R of the valve core 20a. In this way, no matter the rotation direction of the valve core 20a, the part of the sealing gasket 30 extending into the valve core flow passage can exit the valve core flow passage 21a after passing through the pair of grooves 231, so that the folding phenomenon can be avoided.
[0055] It should be noted that the valve core 20a rotates around an axis, and the plane perpendicular to the axis intersects the valve core flow passage port 22a to form two intersection points, which are located on the opposite sides of the valve core flow passage port 22a in the rotation direction R of the valve core 20a.
[0056] With reference back to Figure 9 , the width of the groove 231 can gradually decrease in the direction away from the corresponding valve core flow passage port 22a. According to the embodiments provided by the present disclosure, as away from the corresponding valve core flow passage port 22a, the contact surface of the sealing gasket 30 with the bottom surface of the groove gradually decreases, and the contact surface of the sealing gasket 30 with the outer peripheral surface of the valve core 20a gradually increases, which enables the sealing gasket 30 to gradually obtain the support of the outer peripheral surface of the valve core 20a in the process of exiting the valve core flow passage 21a, and finally press against the outer peripheral surface of the valve core 20a. In addition, this implementation manner can also reduce the volume reduction of the valve core 20a, and ensure the structural strength.
[0057] It can be understood that the edge of the groove 231 can be configured in various shapes, and the present disclosure does not make special limitations thereon. As an example, the edge of the groove 231 can be V-shaped, and the V-shaped opening thereof faces the valve core flow passage port 22a. Of course, in other embodiments, the edge of the groove 231 can also be circular-arc-shaped, and the opening of the circular arc faces the valve core flow passage port 22a.
[0058] It should be noted that the width of the groove 231 refers to the distance between the two edges of the groove 231 in the direction perpendicular to the rotation direction R of the valve core 20a.
[0059] With reference back to Figure 9 , the depth of the groove 231 gradually decreases in the direction of the rotation direction of the valve core 20a and away from the valve core flow passage port 22a. According to the embodiments provided by the present disclosure, the part of the sealing gasket 30 extending into the valve core flow passage 21a can gradually move outward in the radial direction of the valve core 20a, i.e., gradually away from the valve core flow passage 21a, in the process of passing through the groove 231, and finally reach the outer peripheral surface of the valve core 20a, which makes the process of the sealing gasket 30 exiting the valve core flow passage 21a more smooth.
[0060] Further, the bottom surface of the groove 231 can be configured as a smooth curved surface. In this way, in the process of exiting the valve core flow passage 21a, the sealing gasket 30 can be in smooth contact with the bottom surface of the groove 231, so as to avoid the sealing gasket 30 being torn or folded.
[0061] It should be noted that the pair of grooves 231 formed at the same valve core flow passage port 22a have the same size. The same size means that they have the same shape on the outer surface of the valve core 20a, and have the same trend when recessed to the radial inside of the valve core 20a.
[0062] For example, Figure 9 The shapes of the pair of grooves 231 on the outer surface of the valve core 20a are both V-shaped, and gradually decrease in depth as they recede from the valve core flow passage port 22a when recessed to the radially inner side of the valve core 20a. The difference between the two lies in the size of the interface with the valve core 20a, which is caused by the orientation of the valve core flow passage 21a. When the wall thickness between the valve core flow passage 21a and the outer peripheral surface of the valve core 20a is thin, the interface of the groove formed thereon with the valve core is small (as shown by the groove 231 on the left side); when the wall thickness between the valve core flow passage 21a and the outer peripheral surface of the valve core 20a is thick, the interface of the groove formed thereon with the valve core is large (as shown by the groove 231 on the right side).
[0063] Referring to Figure 7 and Figure 9 , the outer peripheral surface of the valve core 20a can be a part of a spherical surface, and the end of the groove 231 that recedes from the valve core flow passage port 22a is located on the horizontal circumferential line of the spherical surface that has the largest outer diameter. The portion of the sealing gasket 30 that is located on the horizontal circumferential line of the spherical surface that has the largest outer diameter travels the farthest, i.e., has the longest movement distance, when passing through the two open edges of the valve core flow passage 21, and thus is prone to folding when exiting the valve core flow passage 21. According to the embodiments provided by the present disclosure, the groove 231 is arranged on the horizontal circumferential line of the spherical surface that has the largest outer diameter to guide the sealing gasket 30, which can ensure that the portion of the sealing gasket 30 that is most prone to folding is smoothly guided to exit the valve core flow passage 21a.
[0064] Referring to Figure 9 , the valve core flow passage port 22a can be configured as a part of a circle, which is shown by a dashed line in the figure and is located on the spherical surface. The minimum distance between the end of the groove 231 that recedes from the valve core flow passage port 22a and the circle is D1, and the diameter of the circle is D2, 1 / 5≤D1 / D2≤1 / 3. If D1 / D2 is too small, it means that the groove 231 can guide the sealing gasket 30 for a short distance, and thus it is difficult to ensure the guiding effect of the gradual opening structure 23 on the sealing gasket 30; if D1 / D2 is set to be too large, it means that the groove 231 will occupy a large space on the outer surface of the valve core 20a, and especially when there are multiple valve core flow passage ports 22a on the valve core 20a, the groove 231 can interfere with the adjacent valve core flow passage port 22a or the groove 231 on the valve core flow passage port 22a. The groove 231 arranged according to the above numerical range can ensure the guiding effect of the groove 231 and avoid interference with other valve core flow passage ports 22a or grooves 231 on the valve core flow passage port 22a.
[0065] It should be noted that in the embodiments provided by the present disclosure, D1 and D2 are straight line distances. Of course, in other embodiments, D1 and D2 can also be arc length distances, i.e. the length of the path along which one point reaches another point on the rotating track of the valve core 20a, and the present disclosure does not limit this.
[0066] With continued reference to Figure 9 , the edges of the recess 231 and / or the edges of the valve core flow passage port 22a can also have a chamfered structure. In the process of rotation of the valve core 20a, the sealing gasket 30 will pass through the edges of the recess 231 and / or the edges of the valve core flow passage port 22a to enter and exit the valve core flow passage port 22a. According to the embodiments of the present disclosure, the edges of the recess 231 and / or the edges of the valve core flow passage port 22a are configured to have a chamfered structure, which can reduce the wear and damage of the sealing gasket 30 when passing through these edges, thereby ensuring the sealing performance.
[0067] With reference to Figure 8 and Figure 9 , on the outer peripheral surface of the valve core 20a, the edges of the sealing gasket 30 surround the edges of the recess 231 and the valve core flow passage port 22a as a whole. Since the recess 231 is located on the corresponding valve core flow passage port 22a, after the valve core flow passage 21a communicates with the external flow passage port 11, the recess 231 also constitutes part of the flow passage. According to the embodiments of the present disclosure, the edges of the sealing gasket 30 surround the edges of the recess 231 and the valve core flow passage port 22a as a whole, which can prevent fluid from leaking through the recess 231.
[0068] It should be understood that the term "comprising" and its variants used in the present disclosure are open and inclusive, i.e. "including but not limited to". The term "according to" is "at least partially according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".
[0069] The protection scope of the present disclosure is not limited to the above-mentioned embodiments, and any person skilled in the art can think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
Claims
1. A valve device, comprising: a valve body having a plurality of external flow passage ports; a valve core disposed in the valve body, the valve core having at least one valve core flow passage therein, the valve core being drivable to rotate to switch a communication relationship between the at least one valve core flow passage and the plurality of external flow passage ports; a plurality of sealing gaskets located at a connection position between each of the external flow passage ports and the at least one valve core flow passage, and fixedly connected with the valve body; characterized in that an opening edge of each of the valve core flow passages is provided with a progressive notch structure configured to guide a smooth transition of an edge of the sealing gasket during rotation of the valve core. 2.The valve device according to claim 1, characterized in that the progressive notch structure comprises a pair of recesses recessed toward a radially inner side of the valve core, the pair of recesses being located on opposite sides of a corresponding valve core flow passage port in a valve core rotation direction, and each recess extending from the corresponding valve core flow passage port toward a direction away from the valve core flow passage port.
3. The valve device of claim 2, wherein a width of the recess gradually decreases in a direction away from the corresponding valve core flow passage port.
4. The valve device of claim 2, wherein a depth of the recess gradually decreases in the valve core rotation direction and in a direction away from the valve core flow passage port.
5. The valve device of claim 2, wherein a bottom surface of the recess is a smooth curved surface.
6. Valve device according to any one of claims 2 to 5, characterized in that an outer peripheral surface of the valve core is a part of a spherical surface, and an end of the recess away from the valve core flow passage port is located on a horizontal circumferential line of the spherical surface having a maximum outer diameter.
7. Valve device according to any one of claims 2 to 5, characterized in that the valve core flow passage port is a part of a circle, a minimum distance of the end of the recess away from the valve core flow passage port to the circle is D1, a diameter of the circle is D2, and 1 / 5≤D1 / D2≤1 / 3.
8. Valve device according to any one of claims 2 to 5, characterized in that an edge of the recess and / or an edge of the valve core flow passage port has a rounded corner structure.
9. The valve device according to any one of claims 1 to 5, characterized in that the sealing gasket comprises a fixed portion and a lip portion, the fixed portion is annular and fixed to the valve body, the lip portion is closer to the valve core than the fixed portion and abuts against an outer peripheral surface of the valve core, the lip portion is outwardly expanded annular, and a thickness of the lip portion gradually decreases as it approaches the valve core.
10. The valve device of claim 9, wherein on the outer peripheral surface of the valve core, an edge of the sealing gasket surrounds an edge of the recess and the valve core flow passage port as a whole.